In a way. Everybody does.
But; I suppose, as with all things, it's when it starts to affect your ability to function in life that it at a level requiring attention.
First; oxygen. Oxygen inhaled through the nose enters the brain via. a COMPLETELY different system than that through the lungs.
The septum (or interconnecting tissue between the nostrils) permits oxygen to enter almost instantaneously.
In fact; so quick is it, that a "quick snort" upon standing up too quickly can remove giddiness completely and render the sufferer instantly coherent.
My brother always says: Beware of people who are too keen to engraciate themselves to you...
Also; the hardest lesson in life to learn is which bridges to cross and which bridges to burn (my emphasis...).
Recently, shyness has been shown to be at least in part to a "shy gene." Doctors were/are unsure as to the efficacy of the replacement spray, because it carries the risk with it that the person, thus uninhibited ; will embark upon reckless relationships, the likes of which they would not ordinarily entertain.
Confidence comes in time. In fact; pretty soon, other things in life will draw you into a growth pattern and before you know it, you'll be a bloomed, full bodied flower, able to attract even the most disinterested of bees. Fact.
But; your resistance is there for a reason (as is certain fear...). Learn to trust your instincts. Set a "multi-layer" approach to how you allow people into your kingdom, and it will never cease to serve you well.
Don't invite people you meet at the bus stop to dinner at your parents (they might turn out to be a serial killer )! But; if you can be intimate somewhere else, and they're happy not to know where you live or whatnot, then that might serve you well also.
I'm not suggesting you become a dirty stop out.
But; hone your natural skill to not suffer fools gladly...